downstream slope
... landscaping 环境美化设计，园林化设计 land-side slope 背水坡，内坡 landslide 滑坡 ...
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背水面坡脚排水 counter drain
切忌在背水坡用黏土压渗，云云会举高滋润线，乃至渗水规模扩张和险情加重。
On the back slope water pressure in clay permeability of avoid by all means, time will take high moisture line, and even the water seepage scale expansion and danger.
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